Rotary brush



June 13, 1967 Y E. F. HARACZ 43,324,496

ROTARY BRUSH Filed Dec. 6, 1 965 2 Sheets-Sheer 1 i E g HI! Ill I II IIII H "'H INVENTOR.

Edward E. F. HARACZ June 13, 11967 ROTARY BRUSH 2 Sheets-Shae? FiledDec.

4 VIII/ZZZ?! INVENTOR. fi 'flazac I Eda rd 3,324,496 ROTARY BRUSH EdwardF. Haracz, 161 Pershing Ave., Clifton, NJ. 08109 Filed Dec. 6, 1965,Ser. No. 521,230 1 Claim. (Ci. 15--183) This invention relates to rotarybrushes and more particularly to a novel construction of a rotary brushadapted for use on a dulling machine.

In the manufacture of laminated plastics, aluminum grain lithographplates, electronic printed circuits, etc., rotary brushes are utilizedto produce finishes of various types. These brushes are carried by adulling machine provided with means for mounting and rotating aplurality of brushes. During use, the brushes wear rapidly, therebyrequiring frequent replacement.

Generally, a dulling machine carries as many as eight brushes and it ishighly desirable to provide brushes of low cost and constructed topermit quick replacement on the machine. My US. Patent No. 3,142,079,dated July 28, 1964, discloses a rotary brush mounting arrangement whichfacilitates the replacement of worn brushes. In this arrangement, acore, carrying radially-extending bristles, is clam-pingly secured inoperative position by arbors inserted into the ends of the core. Thesearbors are provided with cooperating threaded members whereby the arborsmay be separated, quickly, to permit replacement of the brush withoutdismantling other components of the d'ulling machine. The presentinvention is directed to an improved construction of the brush, as such,which brush is adapted for use in the quick-change arrangement shown inthe above-referenced patent, as well as in other applications requiringa rotatable brush.

An object of this invention is the provision of an improved constructionof a brush of the class wherein the bristles extend radially from acore.

An object of this invention is the provision of a brush having sets ofbristles secured to backing strips which backing strips are removablycarried by a tubular core.

An object of this invention is the provision of a brush comprising atubular core for end mounting on rotatable arbors, said core having aplurality of holes formed therein, and sets of bristles carried bybacking strips provided with prongs extending through the core andclinched against the inner wall of the core.

These and other objects and advantages will become apparent from thefollowing description when taken with the acompanying drawings. It willbe understood, however, that the drawings are for purposes ofillustration and are not to be construed as defining the scope or limitsof the invention, reference being had for the latter purpose to theclaim appended hereto.

In the drawings wherein like reference characters denote like parts inthe several views:

FIGURE 1 is a side elevational view of a tubular core made in accordancewith this invention;

FIGURE 2 is an end view thereof;

FIGURE 3 is a side elevational view of one of the brush strips made inaccordance with this invention;

FIGURE 4 is an end view of same;

FIGURE 5 is a back or rear face view of the brush strip;

FIGURE 6 is an enlarged fragmentary, longitudinal sectional view of thecore with the brush strips assembled thereto;

FIGURE 7 is an enlarged, fragmentary, back face view showing one of theprongs prior to outward deformation thereof relative to the backingstrip;

FIGURE 8 is an enlarged fragmentary sectional view showing a prongextending through a hole of the core;

3,324,495 Patented June 13, 1967 FIGURE 9 is a similar view showing theprong pressed into the clinching position; and

FIGURE 10 is a crosssectional line 10-10 of FIGURE 9.

Referring now to FIGURES 1 and 2, the brush core comprises a tubularmember 10 made of any suitable material, preferably extruded aluminumtubing, to provide strength and light weight together with dimensionalstability under high moisture conditions normally encountered in use ona dulling machine. A plurality of holes 11 are formed in the core, as bydrilling or by a gang piercing operation, which holes are formed in setsof longitudinally-extending rows. Also, the end walls of the core areupset to form a plurality of spaced ears 12. Those skilled in this artwill understand that the core may be mounted on suitable arbors, orspindles, inserted into the core ends, such spindles being provided withsplines, entering into the ears 12, thereby to provide a positiverotation of the core.

A brush strip, shown in FIGURES 3-5, comprises a set of bristles 13 bentaround a holding wire 14 and secured in fixed position by theinwardly-directed side walls of an elongated backing strip 16. Punchedin the bottom wall of this strip are a plurality of tapered tanks, orprongs 18, and associated openings 19, see, particularly, FIG- URE 7.When the prongs are formed, they lie flush with the bottom wall of thebacking strip, thereby facilitating the assembly of the bristles to thebacking strip. Then, by means of a suitable tool inserted into the holes19, the prongs are offset outwardly to the positions shown in FIG- URES3-5. When the prongs are so bent, the spacing between the prongscorresponds to that of a set of longitudinally-aligned holes 11 formedin the core, whereby a plurality of the backing strips can be assembledto the core, as shown in FIGURE 6.

The enlarged, fragmentary cross-sectional view of FIG- URE 6 shows thebristles 13 bent around the holding wire 14, the bottom wall of thebacking strip 16 engaging the outer wall of the tubular core 10, and aprong 18 extending through the corresponding hole formed in the core.The length of the prong is such that when it is offset into theclinching position, as shown in FIGURES 9 and 10, the brush strip issecured firmly to the core. After the prongs of the brush strips havebeen inserted through the aligned holes of the core, all of the backingstrips are held in engagement with the core by means of a suitablewrap-around holding fixture. This permits bending of all prongs to theclinching position-s by forcing a rod, of suitable diameter, through thecore.

In the drawings, the holes formed in the core are shown inlongitudinally-aligned sets, whereby each set of holes accommodates theprongs of a described, elongated brush strip. It will be apparent,however, that each set of such holes may be formed along a spiral path,thereby to accommodate sets of brushes each carried by circular backingstrips.

Having now described the invention, those skilled in this art will beable to make various changes and modifications without thereby departingfrom the scope and spirit of the invention as recited in the followingclaim.

I claim:

A quick-change, expendable rotary brush comprising, a tubular corehaving sets of spaced holes formed in the wall, and a plurality of brushstrips each having a U- shaped member substantially equal in length tothe length of said core and the base of which is provided with aplurality of integral prongs, said brush strips being mounted with thebase of each in contact with the outer wall of said core and with theprongs thereof extending through a. set of said holes and bent intocontact with the inner wall of said core, said brush strips each havinga rod disview taken along the UNITED STATES PATENTS 991,876 5/1911Murray 15-1 83 X 2,583,336 1/1952 Jones 15-183 2,821,819 2/1958Bernstein et a1. 15-183 X 3/1958 Febvre 15-205 6/1961 Hoag 15-161 5/1962Febvre 15-205 5/1964 Nelson 15-183 X FOREIGN PATENTS 5/1959 GreatBritain. 1/ 1962 Great Britain.

10 CHARLES A. WILLMUTH, Primary Examiner.

PETER FELDMAN, Assistant Examiner.

